Acta Paediatr Scand
Published: July 1977
The clinical course and biochemical findings in a case of carbamyl-phosphate-synthetase deficiency are described. The patient, a boy, presented 48 h after birth with rapidly developing hypotonia and hypothermia. Pulmonary haemorrhage, melaena and haematemesis ensued and despite ventilatory assistance and peritoneal dialysis the patient died on the fifth day. A virtual absence of carbamyl phosphate synthetase I (N-acetylglutamate dependent) was proved by analysis of tissue samples removed post mortem. Other urea cycle enzymes were normal.
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http://dx.doi.org/10.1111/j.1651-2227.1977.tb07940.x | DOI Listing |
Pediatr Transplant
December 2024
Organ Transplantation Center, National Center for Child Health and Development, Tokyo, Japan.
BMC Pediatr
August 2024
Children's Medical Center, Peking University First Hospital, Beijing, 102600, China.
Background: Carbamoyl phosphate synthetase 1 (CPS1) deficiency (OMIM 237300), an autosomal recessive rare and severe urea cycle disorder, is associated with hyperammonemia and high mortality.
Methods: Herein we present 12 genetic variants identified in seven clinically well-characterized Chinese patients with CPS1 deficiency who were admitted to the Children's Medical Center of Peking University First Hospital from September 2014 to August 2023.
Results: Seven patients (two male and five female patients including two sisters) experienced symptoms onset between 2 days and 13 years of age, and they were diagnosed with CPS1 deficiency between 2 months and 20 years.
J Pediatr Endocrinol Metab
October 2024
Liver Transplantation Center, Memorial Atasehir/Bahçelievler Hospitals, Istanbul, Türkiye.
J Inherit Metab Dis
November 2024
Instituto de Biomedicina de Valencia, IBV-CSIC, Valencia, Spain.
N-acetylglutamate synthase (NAGS) makes acetylglutamate, the essential activator of the first, regulatory enzyme of the urea cycle, carbamoyl phosphate synthetase 1 (CPS1). NAGS deficiency (NAGSD) and CPS1 deficiency (CPS1D) present identical phenotypes. However, they must be distinguished, because NAGSD is cured by substitutive therapy with the N-acetyl-L-glutamate analogue N-carbamyl-L-glutamate, while curative therapy of CPS1D requires liver transplantation.
View Article and Find Full Text PDFJ Inherit Metab Dis
March 2024
Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria.
Carbamoyl phosphate synthetase 1 (CPS1) and ornithine transcarbamylase (OTC) deficiencies are rare urea cycle disorders, which can lead to life-threatening hyperammonemia. Liver transplantation (LT) provides a cure and offers an alternative to medical treatment and life-long dietary restrictions with permanent impending risk of hyperammonemia. Nevertheless, in most patients, metabolic aberrations persist after LT, especially low plasma citrulline levels, with questionable clinical impact.
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